The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 25, 1979
Filed:
Jun. 16, 1978
Naohiro Katayama, Tokyo, JP;
Sawafuji Electric Co. Ltd., Tokyo, JP;
Abstract
A refrigerating system having a compressor; an inverter connected to the compressor for supplying electric energy to the compressor; and an input voltage control circuit provided on the input side of the inverter, wherein the input voltage control circuit generates output voltage signals which change at a predetermined level, including zero level, within a certain temperature range in response to the ambient temperature of the refrigerating system and in accordance with the temperature condition, the voltage thus produced being fed to the compressor via the inverter. The refrigerating system of this invention is, therefore, protected from failure or damage even when placed in an extreme temperature environment, and resumes automatically the supply of power to the compressor when the ambient temperature of the system is restored to the normal temperature.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile